Lub hom phiaj tseem ceeb ntawm lub hnab ntim khoom yog muab cov thauj tog rau nkoj (txhawb nqa) rau lub raj, kom tiv thaiv kev txav ntsug ntawm lub raj. Cov haujlwm ntxiv ntawm cov packer muaj xws li:
• muab lub foob ntawm lub raj thiab lub qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob
• tso cai rau kev ncig ntawm tubing thiab casing-tubing annulus kom tua lub qhov dej thiab tsis txhob muaj lub taub hau nyuj,
• tso cai cais tawm ntawm ib tug neeg ua ib cheeb tsam,
• tso cai rau kev txhim kho cov txheej txheem nqa khoom thiab
• pab txhawb kev pabcuam zoo (nrog rau kev kho mob) kev ua haujlwm ua haujlwm thiab kev txhawb nqa kom zoo
Txhawm rau ua cov haujlwm saum toj no, txhua tus neeg ntim khoom muaj peb lub ntsiab lus tseem ceeb:
• cones
• swb
• cov khoom ntim
Ib khub ntawm cones yog siv los tsav tapered slips. Cov slips no raug yuam tawm mus rau hauv lub casing los muab lub thauj tog rau nkoj. Cov khoom sib khi, uas feem ntau yog ua los ntawm cov khoom siv roj hmab hluavtaws, kuj tseem raug rub tawm thiab mus rau hauv lub casing yog li muab kev sib khi zoo hauv lub casing-tubing annulus. Raws li lub hauv paus ntsiab lus no peb hom packers yog siv:
• mechanical set packer,
• hydraulic teeb packer thiab
• packer mus tas li.
